Podcast
Questions and Answers
Which of the following is NOT a method for combining multiple datasets from different databases in multi-table queries?
Which of the following is NOT a method for combining multiple datasets from different databases in multi-table queries?
- VLOOKUP (correct)
- Join
- Subquery
- Matching keys
What is the purpose of a subquery in multi-table queries?
What is the purpose of a subquery in multi-table queries?
- To retrieve data from one table based on data from another table(s) (correct)
- To retrieve data from multiple tables at the same time
- To test a given condition using matching columns
- To connect multiple queries using parentheses
What is the function of the JOIN operator in multi-table queries?
What is the function of the JOIN operator in multi-table queries?
- To test a given condition using matching columns
- To retrieve data from one table based on data from another table(s)
- To connect multiple queries using parentheses
- To retrieve data from multiple tables at the same time (correct)
Which attribute(s) are used to organize and store business data?
Which attribute(s) are used to organize and store business data?
What is the purpose of the VLOOKUP function in MS Excel?
What is the purpose of the VLOOKUP function in MS Excel?
What is the main difference between IN and EXISTS in SQL?
What is the main difference between IN and EXISTS in SQL?
When is the EXISTS clause typically used in a SQL query?
When is the EXISTS clause typically used in a SQL query?
What does the EXISTS clause return if the subquery returns any rows?
What does the EXISTS clause return if the subquery returns any rows?